cap_deployer.rb

# This plugin will deploy your app using capistrano.
# If the build fails the app won't de be deployed and if it passes it will try to deploy to a list of stages you can supply.
# It will send an email notifying if it was successful or not and a special artifact with the capistrano output will be created.
#
# Configuration
# In your project's cruise_config.rb file:
#
# Set the email addresses which should be notified about deployment
# project.cap_deployer.emails = ['email@example.com']
#
# Pass an array of stages you want to deploy to
# project.cap_deployer.stages = ['staging','production']
#
# Important: this plugin assumes you are using ssh keys for deployment
#
class CapDeployer
  attr_accessor :emails
  attr_accessor :stages
  attr_writer :from

  def initialize(project = nil)
    @emails = []
    @stages = []
  end

  def from
    @from || Configuration.email_from
  end

  def logger
    CruiseControl::Log
  end

  def build_finished(build)
    return if build.failed?
    deploy build
  end

  private

  def deploy(build)
    logger.info DateTime.now.strftime("%Y-%m-%d %H:%M:%S") + " cap_deployer: Starting deployment"
    path = build.project.path + "/work/"
    for stage in @stages
      success = system "cd #{path} && cap #{stage.to_s} deploy > #{build.artifacts_directory}/cap_deploy_#{stage.to_s}.txt"
      logger.info DateTime.now.strftime("%Y-%m-%d %H:%M:%S") + " cap_deployer: Deploying to stage #{stage} #{success ? 'successful' : 'failed'}"
      notify(success, build, stage.to_s)
    end
    logger.info DateTime.now.strftime("%Y-%m-%d %H:%M:%S") + " cap_deployer: Finished deployment"
  end

  def notify(success, build, stage)
    if success
      email :deliver_build_report, build, "#{build.project.name} build #{build.label} has been deployed to stage #{stage}", "The build was deployed to stage #{stage}."
    else
      email :deliver_build_report, build, "#{build.project.name} build #{build.label} could not be deployed to stage #{stage}", "The build could not be deployed to stage #{stage}."
    end
  end

  def email(template, build, *args)
    BuildMailer.send(template, build, @emails, from, *args)
    CruiseControl::Log.event("Sent e-mail to #{@emails.size == 1 ? "1 person" : "#{@emails.size} people"}", :debug)
  rescue => e
    settings = ActionMailer::Base.smtp_settings.map { |k,v| "  #{k.inspect} = #{v.inspect}" }.join("\n")
    CruiseControl::Log.event("Error sending e-mail - current server settings are :\n#{settings}", :error)
    raise
  end


end

Project.plugin :cap_deployer

# Original version written by Eric Lucas: http://jira.public.thoughtworks.org/browse/CCRB-117
# Additional improvements by Alberto Perdomo